Pencil sharpener



July 8, 1930.

c. H. BLOMGRi EN 1,770,062

PENCIL SHARPENER Filed June 12, 1928 Cor/ ff BZamy/en Inventor A ltorneyPatented July 8, 1930 CARL H. BLOMGBEN, OF SP OK ANE, WASHINGTON amen.snanrnnm Application filed June 1a, 1928. ilerial No. 284,855.

My present invention relates to an improved pencil sharpener designedespecially for the purpose of sharpening the points of lead pencilshaving, a mechanical feed for the lead, but also adapted for sharpeningthe leads ofother kinds of pencilsand similar articles.

in carrying out my invention 1 utilize a stationary head having anannular or conical abrading face or surface around which the pencil. isrevolved with its lead in frictional contact with the abrading' surface.A revolving pencil holder is used to carry the pencil and the pencil ismaintained in rigid relation to the revolving holder as the penoil-leadfrictionally engages the abrading surface.

-The primary object of my invention is the provision of a pencilsharpener of this type whereby the leads of mechanical-feed pencils maybe sharpened without marring the point of the pencil case, which in manyinstances is fashioned from gold, silver, and other ornamental andvaluable materials, and as is well known these parts are frequentlymarred when a file, knife or other abrading tool comes in contact withthe pen cil case. 4

The invention consists in certain novel combinations and arrangements ofparts as will hereinafter be more fully pointed out and claimed. In theaccompanying drawings I have illustrated one complete example of thephysical embodiment of my invention wherein 'the parts are combined andarranged according to the best mode I have so far devised for thepractical application of the principles of my invention, but it will beunderstood that changes and alterations may be made therein within thescope of my appended claim without departing from the principles of theinvention.

Figure 1 is a perspective viewof a pencil sharpener embodying myinvention.

Figure 2 is a sectional detail view, at line 2-2 of Figure 1 showing apencil in the holder for sharpening.

Figure 3-is a perspective view of the base or supporting block of thedevice.

Figure {l is a perspective tionary abrading head.

Figure 5 is a perspective view of the revolving pencil holder.

Figure 6 is a view of a pencil having a mechanical feed for its leadpoint, before sharpening, and Figure 7 is a view of the same pencilafter sharpening its lead on the device of my invention;

The base or block 1 is preferably of cir cular shape and of suitablesize and material, and when of suflicient weight may be used as a paperweight on the desk or table. A cushion or pad 2 of felt or similarmaterial, is used on the bottom of the base to prevent marring the desktop when the device is used as a paper weight and to provide thenecessary friction betweenthe base and its support when the sharpeningdevice is being employed to sharpen the lead L of the pencil P.

in its upper face the block or base is fashioned with annular groove 3that forms a pocket for the lead dust produced by abrasion, and in thecenter of the pocket 2. boss 4, of circular shape, is fashioned, saidboss having a central screw hole 5 and a pair of spaced pin holes 6. Thestationary abrading head 7 is provided with an annular or conicalabrading surface or face 8 and the head, which is larger in diameterthan the boss, is fixed thereto so that its lower edge projects beyondthe edge of the boss and forms an overhanging, partial closure for thepocket to retain dust from abrasion, as well as providing a clearabrading surface for freedom of movement of the lead L, as it revolvesabout the head.

The head is affixed to the boss by the use of a screw 9 and a pair ofdowel pins 10, the former threaded in the hole 5 and the latter forcedinto the pin holes 8 to provide a rigid, stationary head and abradingsurface.

The pencil holder, which is revolvable about the head, comprises an arm11 that is ournaled on a shoulder 12 beneath the head 13 of the screw 9,and at its outer, free end this arm has a socket head 1 in which atapered bushing 15 is fixed. The bushing is preferably. of rubber orother similar .resilview of the staient, elastic material to form acushion for the point P, of the pencil case, and possessing thenecessary frictional qualities to clasp the tapered metal point of thepencil case. Thus, the pencil point P is pushed into the bushing, anddue to the frictional qualities of the bushing material, the point isclasped or clamped without danger of marring the point P, and the pencilis held rigid with the pencil holder and against rotation on its ownaxis. The lead of the pencil projects through the bushing for frictionalcontact with the abrading face of the head, and one revolution of thepencil holder will cause an abrasion of the annular periphery of thelead. If necessary a second or third revolution may be given to theholder and pencil, and at the same time pressure is applied to thepencil to force the lead across the abrading surface of the head for thepurpose of providing a sharp point to the lead.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is The combination with a stationary headhaving an annular abrading surface, of a revolvable pencil holderjournaled in the head, a socket head on the holder, and a rubber bushingfixed within said socket head.

In testimony whereof I afiix my signature.

CARL H. BLOMGREN.

